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Hydrothermal Synthesis and Characterization of Ce1-xMnxO2-δ Solid Solutions

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【作者】 张国芳； 李莉萍； 李广社； 邱晓清；

【Author】 ZHANG Guo-Fanga,b,c LI Li-Pinga LI Guang-Shea QIU Xiao-Qinga a(State Key Laboratory of Structural Chemistry,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou 350002,China) b(Research Institute of Photocatalysis,Fuzhou University,Fuzhou 350002,China) c(Rare Earth School,Inner Mongolia University of Science and Technology,Baotou 014010,China)

【机构】 State Key Laboratory of Structural Chemistry,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences； Research Institute of Photocatalysis,Fuzhou University； Rare Earth School,Inner Mongolia University of Science and Technology；

【摘要】 Nanocrystals of Ce1-xMnxO2-δ(x=0.00,0.05,0.10,0.15,and 0.20) were synthesized by a hydrothermal reaction route.The solid solutions crystallized in a cubic fluorite structure with a particle size in the range of 11～15 nm.The incorporation of Mn ions in CeO2 resulted in a lattice volume reduction.Mn ions showed a mixed valence state of +2,+3 and +4 in CeO2 lattice.An obvious red-shift of the absorption threshold edge was observed from the UV-visible spectrum.Compared with the bulk CeO2,Ce1-xMnxO2-δ nanocrystals exhibited a lower releasing oxygen temperature as indicated by TPR technique.

【Abstract】 Nanocrystals of Ce1-xMnxO2-δ(x=0.00,0.05,0.10,0.15,and 0.20) were synthesized by a hydrothermal reaction route.The solid solutions crystallized in a cubic fluorite structure with a particle size in the range of 11～15 nm.The incorporation of Mn ions in CeO2 resulted in a lattice volume reduction.Mn ions showed a mixed valence state of +2,+3 and +4 in CeO2 lattice.An obvious red-shift of the absorption threshold edge was observed from the UV-visible spectrum.Compared with the bulk CeO2,Ce1-xMnxO2-δ nanocrystals exhibited a lower releasing oxygen temperature as indicated by TPR technique.

【关键词】 Mn doped； solid solutions； hydrothermal method； valence state；
【Key words】 Mn doped； solid solutions； hydrothermal method； valence state；
【基金】 Supported by NNSFC (Nos 20671092, 20773132, 20771101);National Basic Research Program of China (No 2007BAE08B01, 2009 CB613306)
  • 【文献出处】 结构化学 ,Chinese Journal of Structural Chemistry , 编辑部邮箱 ,2010年02期
  • 【分类号】O611.3
  • 【被引频次】1
  • 【下载频次】67
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